For more than 40 years, these quick-service franchises have proved that fast food is here to stay. Whether its pizza, hamburgers, tacos or donuts, these tasty franchises continue to draw crowds around the world. Here are our picks for the Top 10 Fast Food Franchises of 2008.

#1 Subway2008 Franchise 500 ranking: #2
Submarine sandwiches & salads
Since opening in 1965, Subway has grown from a tiny submarine sandwich shop into the world's largest submarine sandwich chain. With more than 28,000 restaurants in 86 countries, Subway continues to grow through its image as a fresh, healthy alternative among fast-food restaurants. Subway has claimed the No. 1 spot 15 times on Entrepreneur's Top 10 since it debuted in 1988.

#2 Dunkin' Donuts2008 Franchise 500 ranking: #3
Coffee, doughnuts, baked goods
Dunkin' Donuts is the world's largest coffee and baked goods chain. In addition to selling 52 varieties of donuts and more than a dozen coffee beverages, the chain also carries an array of bagels, breakfast sandwiches and other baked goods. With more than 5,000 U.S. franchises, Dunkin' Donuts has maintained a consistent Top 10 ranking since 2004.

#3 Pizza Hut2008 Franchise 500 ranking: #4
Pizza
In 1958, brothers Frank and Dan Carney borrowed $600 from their mother to open a small pizza parlor in their hometown of Wichita, Kansas. Fifty years later, America's first pizza chain hasn't stopped growing. Pizza Hut's specialty pizzas can be found in franchises throughout the world, and the restaurant continues to be a popular destination for pizza lovers.

#4 McDonald's2008 Franchise 500 ranking: #5
Hamburgers, chicken, salads
This famous hamburger restaurant has made the Top 10 ranking 27 times in the 29 years we've been compiling the Franchise 500. Ray Kroc opened his first restaurant in 1955 and earned a modest first day's revenue of $366.12. More than 50 years later, McDonald's earns more than $23 billion a year.

#5 Sonic Drive-In Restaurants2008 Franchise 500 ranking: #6
Drive-in restaurant
Since opening in 1953, this drive-in, car-hop restaurant hasn't strayed far from its roots. Originally started as a hamburger and root beer stand, Sonic now offers wraps, smoothies and other signature items in addition to its traditional American classics. With 3,350 drive-ins coast to coast, average unit sales are more than $1 million a year.

#6 KFC Corp.2008 Franchise 500 ranking: #7
Chicken
Harland Sanders opened the first KFC restaurant in a Kentucky gas station during the Great Depression. Nearly 80 years later, his original recipe is still used in more than 11,000 restaurants worldwide.

#7 Domino's Pizza LLC2008 Franchise 500 ranking: #9
Pizza, breadsticks, buffalo wings
Started in 1960 with $500, this pizza giant had $5.1 billion in global retail sales in 2006 and delivered more than 400 million pizzas. This is the ninth time Domino's Pizza has appeared in the Top 10.